Final answer:
The biggest change in American society during the Age of Jackson was political participation.
Step-by-step explanation:
The biggest change in American society during the Age of Jackson was political participation. By the late 1820s, nearly all adult white men had gained the right to vote, which extended democracy to a larger portion of the population. More government positions also became elective rather than appointive. The era saw the rise of political parties and increased political battles between Whigs and Democrats.